CN1264128C - Method and device for processing vedio data on display device - Google Patents

Method and device for processing vedio data on display device Download PDF

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CN1264128C
CN1264128C CNB018069266A CN01806926A CN1264128C CN 1264128 C CN1264128 C CN 1264128C CN B018069266 A CNB018069266 A CN B018069266A CN 01806926 A CN01806926 A CN 01806926A CN 1264128 C CN1264128 C CN 1264128C
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dither
video
number
based
used
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CN1462423A (en
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卡洛斯·科雷亚
塞巴斯蒂安·魏特布鲁赫
雷内·茨温
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汤姆森许可贸易公司
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • G09G3/2044Display of intermediate tones using dithering
    • G09G3/2051Display of intermediate tones using dithering with use of a spatial dither pattern
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • G09G3/2018Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2029Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames having non-binary weights
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2003Display of colours
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels

Abstract

本发明涉及等离子显示板控制的两种新的预处理。 The present invention relates to a plasma display panel two new pretreatment control. 等离子体技术有降低灰度级描绘的缺点。 Plasma technology has the disadvantage of reducing the gradation drawing. 这是由于与CRT不同,那里的亮度与所加的阴极电压的近似平方成正比,而在PDP中,亮度与其中的放电脉冲数是线性关系。 This is due to a CRT, where the luminance is proportional to the applied cathode voltage is approximately square, and in the PDP, the brightness and the number of discharge pulses which are linear. 所以,在子域编码进行之前,要在输入视频信号分量R、G、B上加一个近似平方的消除灰度系数函数。 Therefore, before sub-field encoding to the input video signal components R, G, plus a square approximation on the B-elimination of the gamma function. 要求对8位视频数据截尾,所以消除灰度系数函数的效果不能完全维持。 Requirements for 8-bit video data is truncated, so the effect of eliminating the gamma function can not be fully maintained. 特别是在眼睛敏感度的低视频电平区域,灰度级描绘较差。 In particular, the eye sensitivity is low video level region, poor gradation drawing. 根据本发明,建议使用一种新的适用于PDP特性的高频抖动技术,以改善灰度级描绘。 According to the present invention, it is recommended to use a new dither technique is applicable to PDP characteristics, to improve the gradation drawing. 这种修正包括可单独或组合使用的三种高频抖动特征,它们是:基于单元的高频抖动,即对一个象素的每一彩色分量R、G、B施加离散的的高频抖动数;基于对象/区域的高频抖动,即根据视频图像中的区域/对象,形成可任意使用的高频抖动数组;根据视频信号电平,形成可任意使用的高频抖动数组。 This correction may be used alone or comprising a combination of the three dither features used, they are: based on dither cell, i.e. for each color component of a pixel of R, G, B applied to a discrete number of high-frequency jitter ; dither based object / area, i.e. the area of ​​the video image / object, the dither array is formed may optionally be used; the level of the video signal, the dither array is formed may optionally be used.

Description

处理在显示装置上显示的视频图像数据的方法和装置 Method and apparatus for processing video image data displayed on a display device

技术领域 FIELD

本发明涉及在显示装置上显示的视频图像数据的处理方法和装置。 The present invention relates to a method and apparatus for processing video image data displayed on the display device. 更具体地,本发明密切涉及一种用来改善图像的图像质量的视频处理,这些图像,显示在矩阵显示器例如等离子显示板(PDP)或其他显示装置上,其中,象素值对显示器上相应的细小光脉冲数的产生起控制作用。 More particularly, the present invention relates to a close video processing for improving image quality of an image, the image displayed on the matrix display such as a plasma display panel (PDP) or other display means, wherein pixel values ​​corresponding to the display the number of generated fine light pulse functions as a control.

背景技术 Background technique

目前,等离子体技术可以实现大尺寸(超出阴极射线管的限制)和没有任何视角约束的很有限厚度的平面彩色显示板。 Currently, plasma technology can achieve a large size (out of the CRT limitations) and without any viewing angle constraints limited the thickness of the flat color display panel.

参考欧洲最新一代TV,已经做了大量工作改善电视图像质量。 Reference the latest generation of European TV, it has done much to improve the quality of television pictures. 因此,像离子体电视的新技术不得不提供与标准的TV技术同样好或更好的图像质量。 Therefore, new technologies like plasma TVs have to provide a standard TV technology as good or better image quality. 一方面,等离子体技术可以提供“无限制”的屏幕尺寸,有吸引的厚度……,但另一方面,它所产生的新型赝像将会降低图像质量。 On the one hand, plasma technology can provide "unlimited" screen size, thickness ...... attractive, but on the other hand, new artifacts it produces will reduce image quality.

大多数赝像与CRT TV图像不同,因为人们经常无意地习惯看老的TV赝像,所以这些新赝像就更为显目。 Most artifacts and CRT TV different images, because people often inadvertently used to watch old TV artifacts, so these new artifacts even more conspicuous.

等离子显示板(PDP)使用的是只能“ON”(“开”)或“OFF”(“关”)的放电单元的矩阵阵列。 A plasma display panel (PDP) using only the "ON" matrix array of discharge cells ( "On") or "OFF" ( "off") of the. 不像CRT或LCD(液晶显示器)那样通过光发射的模拟控制表示灰度级,PDP是通过调制每一帧的光脉冲(维持脉冲)数来控制灰度级的。 Unlike analog control CRT or LCD (liquid crystal display), as represented by the light emission gradation, PDP is controlled by light pulses (sustain pulses) per frame modulated gray level. 这个时间调制将在对应于眼睛时间响应的周期中由眼睛进行积分。 This modulation cycle time corresponding to the eye time response of integrated by the eye.

因为视频幅度确定了发生在给定频率上的光脉冲数,较高的幅度意味着较多的光脉冲因而较长的“ON”时间。 Since the video amplitude determines the number of light pulses occurring at a given frequency, higher amplitude means more light pulses and thus a longer "ON" time. 因此,这种调制也被称为PWM,即脉冲宽度调制。 Accordingly, this modulation is also known as the PWM, i.e. Pulse Width Modulation.

这种PWM导致一个PDP图像质量问题:灰度级描绘的质量较差,特别是在图像较暗的区域。 This results in a PWM PDP image quality problems: the poor quality gray scale drawing, especially darker regions in the image. 这是由于这样的事实,即显示的亮度与脉冲数是线性关系,而眼睛对噪声的响应及其敏感度不是线性关系。 This is due to the fact, i.e., the number of pulses the display luminance is linear, but the eye response and sensitivity to noise is not linear. 眼睛对较暗的区域比对较亮的区域更为敏感。 Eyes more sensitive than the lighter areas of the dark area. 这意味着即使新式的PDP能为每个彩色分量R,G,B(红、绿、蓝)显示例如255个离散的视频电平,但在较暗区域的量化误差也是很显著的。 This means that even a new PDP can each color component R, G, B (red, green, blue) display, for example, 255 discrete video levels, quantization error in a dark area but also very significant. 再有,在PDP显示器中,所要求的消除灰度系数(degamma)函数增加了视频暗区的量化噪声,引起明显的分辨率不足。 Further, in the PDP displays, required to eliminate gamma (Degamma) function increases the quantization noise in video dark areas, causing significant insufficient resolution.

已知的某些解决方法利用高频抖动方法减轻量化噪声的感受性。 Some solutions known to reduce the sensitivity of the quantization noise by the dither method. 但这些解决方法并没有针对显示器和显示影像的性质。 But these solutions are not against nature displays and display images. 文献中提出的高频抖动方法主要是在改善非移动的黑白图像(电视传真应用和报纸照片描绘)的质量方面发展。 Dither method proposed in the literature mainly in the development of improved non-moving black and white images (TV fax application and newspaper photo depicting) the quality. 所以,如果将同样的高频抖动算法直接应用于PDP,所获得的结果并不是最佳的。 Therefore, if the same is directly applied to the PDP dither algorithm, the result obtained is not optimal.

发明内容 SUMMARY

为克服减少的灰度级描绘的缺点,本发明提供一种适用于PDP中的些特殊问题的高频抖动技术。 To overcome the drawback of reduced gray scale drawing, the present invention provides a PDP suitable for some special problems of the dither technique.

为获得较好的灰度级描绘,在载断至最后的灰度级幅度位分辨率之前,在视频信号上加上高频抖动信号。 In order to obtain good gradation drawing, set off prior to the last bit gray scale amplitude resolution, plus dither signal on the video signal. 如前所述,高频抖动本身在技术文献中是一种众所周知的技术,用于降低由于被显示的分辨位数的减少而导致的量化噪声的影响。 As described above, the dither is itself a well known technique in the technical literature, used to reduce the effects of quantization noise due to the reduced number of bits of resolution caused to be displayed. 利用高频抖动,在现有的视频电平之间加上一些人为的电平。 Using dither, between the existing video levels plus some artificial levels. 这样可改善灰度级描绘,但在另一方面,也增加高频率、低幅度的高频抖动噪声,这种噪声对只处于较短观看距离的观察者来说是明显的。 This improves the gray scale is depicted, but on the other hand, also increases the dither high frequency, low amplitude, that only noise is shorter viewing distance of the viewer is apparent.

根据本发明的解决方法,在PDP特制产品中采用高频抖动信号,以便获得最佳化的灰度级描绘,同时高频抖动噪声最低。 The solution of the invention, the use of a special product in the PDP dither signal to obtain the best gray level of the drawing, while the lowest noise dither. 有三种具体的技术,它们可以单独地或组合地应用于最佳化,它们是:—基于单元的高频抖动:适用于等离子显示器的单元结构。 There are three concrete techniques which may be used alone or in combination to optimize, which are: - based on dither cell: cell structure suitable for a plasma display and the like.

—基于对象的高频抖动:适用于被显示的视频图像结构。 - based on high frequency jitter object: structure for video images to be displayed.

—基于幅度的高频抖动:适用于被显示的视频图像中象素或像素区的幅度电平。 - based on high frequency jitter amplitude: for the amplitude level of the video pixel or pixel region in the displayed image.

基于单元的高频抖动,是加上一个高频抖动信号,它是为每一等离子单元(每一象素有三个单元R,G,B)而不是为每一象素确定的。 Based dither unit, a dither signal is plus, it is for every plasma cell (there are three units of each pixel R, G, B) rather than for each pixel is determined. 这使高频抖动噪声对观察者来说,变得精细而不那么显眼。 This allows dither to the observer, becomes fine and not so conspicuous.

基于对象的高频抖动的意思是,只为一定的图像内容的对象加上高频抖动信号,或者对显示的对象的位分辨率,采用可任意使用的高频抖动数的组。 Object-based dithering means that, only for a certain target image contents plus the dither signal, or the bit resolution of the displayed object, using the number of groups of any dither may be used. 换句话说,用于高频抖动数的位分辨率被做得与显示对象的位分辨率相适应。 In other words, the number of dithering bits for the resolution is made to adapt the resolution of the display position of the object. 下面将用两个例子帮助阐明这个想法:1.OSD(屏幕显示)几乎都是每一彩色分量R、G、B的具有4位分辨率产生的。 The following two examples will help to clarify this idea: 1.OSD (display) are almost always produced having a resolution of each of four color components R, G, B of. 这表示显示器灰度分辨率(每一彩色分量R,G,B为8位),足以正确描绘这类OSD,所以,加上高频抖动信号只会增加高频抖动噪声,而不会带来明显的好处。 This means that the display gray scale resolution (each color component R, G, B is 8 bits), this type of drawing sufficient to correct the OSD, therefore, together with the dither signal will dither increased without incurring significant benefits.

2.如果一个PC图形卡被连接至等离子显示器,例如为256个彩色模式,加上高频抖动信号也是无用的。 2. If a PC graphic card is connected to the plasma display, for example, 256 color mode, plus the dither signal is useless. 每一彩色分量R、G、B的位分辨率在这种模式中也是很低的。 For each color component R, G, B bit resolution in this mode is very low. 使用高频抖动技术不会改善灰度级描绘。 Using dither technique does not improve the gradation drawing. 这就像图形卡串加上自己的高频抖动信号,以补偿减少的彩色数目。 This string with their own graphics cards like the dither signal, in order to compensate for the reduced number of color.

基于幅度的高频抖动的意思是,将可任意使用的高频抖动数组做成视频信号分量的函数。 Based on the amplitude of high-frequency jitter it means dither array will be used to make an arbitrary function of the video signal component. 换句话说,这里表示的是高频抖动的位分辨率被做得与视频信号分量的幅度相适应。 In other words, this represents the dither bit resolution be made compatible with the amplitude of the video signal component. 与较小(较暗)的视频值相反,在应用平方的消除灰度系数函数时较大的视频值不损失位分辨率。 Smaller (darker) video values ​​of the contrast, the larger value the video gamma function is applied to eliminate without losing the square-bit resolution. 因此,高频抖动位数可随幅度的函数而减小。 Thus, the dither amplitude as a function of the number of bits can be reduced.

因此,提供了一种处理在显示器上显示的RGB视频图像数据的方法,所述显示器具有多个与视频图像象素的彩色分量相应的发光元件,其中,高频抖动方法被应用于视频数据,以细化视频图像中的灰度级描绘,其特征在于:在高频抖动方法中,输入视频数据被转换为消除灰度系数校正补偿的较高位分辨率,并且高频抖动数被加到较高位分辨率的输入视频数据上,在输入视频数据被转换为最后的位分辨率的截断步骤之后,高频抖动方法包括下列单独或组合使用的一个或多个特征:被加至视频帧的给定象素的彩色分量R、G、B的视频数据上的高频抖动数是彼此区别和不同的;根据视频图像中的区域/对象,形成可任意使用的高频抖动数组;根据视频信号电平,形成可任意使用的高频抖动数组。 Accordingly, there is provided a method of processing RGB video image data displayed on a display, said display having a plurality of pixels of the color components of the video image corresponding to the light emitting element, wherein the dither method is applied to video data, to refine the gray scale video image drawing, wherein: in the dither method, the input video data is converted into gamma-correction to eliminate a higher bit resolution, and the high frequency jitter is added to the number of relatively the high-resolution input video data after the input video data is converted to final bit resolution truncation step, the dither method comprising one or more features alone or in combination: a video frame to be added to the given pixel color components R, a high-frequency jitter on the number of video data of G, B are different from each other and the difference; region of the video image / object, the dither array is formed may optionally be used; the video signal level, the dither array is formed may optionally be used.

另外,提供了一种用于处理在显示器上显示的视频图像的装置,所述显示器具有多个与视频图像象素的RGB彩色分量相应的发光元件,所述装置包括计算高频抖动数的高频抖动单元,所述高频抖动数被加至视频图像数据,以细化视频图像中的灰度级描绘,其特征在于:在高频抖动单元内,包含将输入视频数据转换为较高位分辨率的转换装置,和将高频抖动数加至较高位分辨率的输入视频数据的加法装置,以及进行截断步骤的截断装置,在截断步骤中输入的视频数据被转换为最后的位分辨率,高频抖动单元根据下列单独或组合使用的一个或多个特征计算高频抖动数:高频抖动单元对RGB彩色分量使用不同的高频抖动数图形,以便将彼此区别和不同的高频抖动数加到给定象素的RGB分量;装置,根据视频图像中的区域/对象,选择不同的可任意使用的高频抖动 Further, there is provided an apparatus for processing a video image displayed on a display, said display having a plurality of video images of the RGB color components of pixels corresponding to the light emitting element, said calculating means comprises a number of high-frequency jitter high frequency dithering unit, a dither number is added to the video image data to refine the gray scale video image drawing, wherein: in the dither means comprises the input video data into a higher bit resolution rate conversion means, and a high-frequency jitter is added to the number of higher bit resolution of input video data addition means and the truncation means for truncating step, the input video data in a cutoff step is converted into the final bit resolution, the dither frequency dithering unit number calculated according to the one or more features alone or in combination: the use of different dither unit number of the dither pattern of RGB color components in order to distinguish from one another and different from the number of the dither was added to the RGB components of the given pixel; means, in the region of the video image / object, select a different dither can optionally be used 数组;装置,根据视频信号电平,选择不同的可任意使用的高频抖动数组。 Array; means according to the level of the video signal, select a different dither array may optionally be used.

附图说明 BRIEF DESCRIPTION

本发明的示范实施例显示在附图中,并在下面的描述中作更详细的解释。 An exemplary embodiment of the present invention shown in the drawings and explained in more detail in the following description.

图1示出以子域中的小脉冲激话等离子单元;图2示出基于象素和基于单元的抖动;图3示出基于三维单元的抖动图形;图4显示在PDP中本发明的电路装置的方块图。 Figure 1 shows a small laser pulse, then the other child domain plasma cell; FIG. 2 illustrates a pixel-based dithering and cell based; Figure 4 shows a circuit in the PDP of the present invention; FIG. 3 shows a three-dimensional cell-based dithering pattern a block diagram of a device.

具体实施方式 Detailed ways

在图1中,以图解示例说明在等离子显示板上产生光的一般概念。 In Figure 1, diagrammatic illustration of the plasma display panel of the general concept of light generation. 如前所述,等离子单元只能被接通或关断。 As described above, plasma cell can only be switched on or off. 因此,在等离子单元被接通时的一些小脉冲处就产生光。 Thus, in some other small pulse is turned on at the time of plasma cell produces light. 通过调制每帧周期的小脉冲数产生不同的颜色。 Produce different colors by a small number of pulse modulation for each frame period. 为此,帧周期被划分为所谓子域SF。 For this purpose, a so-called frame period is divided into sub-fields SF. 每个子域SF已经分配了专门的加权,该加权决定这个子域SF中产生多少个光脉冲。 Each sub-field SF has assigned a specific weight which determines how many light pulse weighting the sub-field SF is generated. 光的产生受子域码字控制。 The light generated by the control sub-field code word. 子域码字是一个控制子域激活和失活的二进制数。 Sub-field code word is a control and activation subdomain binary inactivated. 被置1的每一位激活相应的子域SF,被置0的每一位使相应的子域SF失效。 Is activated every respective set of sub-field SF, each bit is set to the corresponding sub-field SF 0 of failure. 在被激活的子域SF中,被分配的光脉冲数将被产生。 In the activated sub-field SF, the number of light pulses is assigned to be generated. 在失活的子域中,将没有光产生。 In subdomain deactivated, there will be no light generation. 具有12个子域的典型的子域结构表示在图1中。 A typical sub-field organization with 12 sub-fields is shown in FIG. 子域加权在图的上部列出。 In the sub-field weights are listed in the upper portion of FIG.

图示的帧周期稍长于全部子域周期连在一起的周期。 Frame period is illustrated slightly longer than all the sub-field periods together period. 其原因是,对于非标准视频源,视频行可能是易受抖动的,为确保所有子域SF能填入抖动的视频行中,则所有子域SF的时间总量应稍短于标准视频的周期。 The reason is that, for non-standard video sources the video line may be susceptible to jitter, to ensure that all sub-fields SF can fill shaky video line, the total amount of all the sub-fields SF is slightly shorter than a standard video time should the cycle.

为了简明,在这里给出术语子域的定义:子域是一个时间周期,其中,就每个单元依次安排如下:1.有一个写/寻址周期,其中,单元要么以高电压引向激励状态,或者以低电压引向中性状态。 For simplicity, the definitions of terms are given herein subdomains: subdomain is a period of time, wherein each cell in turn on as follows: 1. There is a writing / addressing period in which the unit or directed to a high voltage excitation state, or in a neutral state toward a low voltage.

2.有一个维持周期,其中,气体放电形成短电压脉冲,该脉冲引起相应的短发光脉冲。 2. There is a sustain period, wherein the gas discharge to form short voltage pulse which causes the corresponding light-emitting short pulses. 当然,只有前面已被激励的单元才产生发光脉冲。 Of course, only the cells previously excited to produce light emission pulse only. 在中性状态下的单元中没有气体放电。 No gas discharge in the cell in a neutral state.

3.有一擦除周期,其中,单元的电荷被消除。 3 has an erase cycle, wherein the charge unit is eliminated.

如前所述,等离子利用PWM(脉冲宽度调制)来产生不同灰度的色调。 As described above, the plasma using a PWM (pulse width modulation) to generate the different shades of gray. 与CRT相反,在CRT中,亮度近似地与阴极电压成平方关系,而在PDP中,亮度与放电脉冲数成线性关系。 In contrast to a CRT, the CRT, the luminance of the cathode voltage is approximately proportional to the square, and in the PDP, the brightness of the discharge pulses is linear. 因此,在PWM之前,近似平方的消除灰度系数函数就要加到输入的视频信号分量R,G,B上。 Thus, prior to the PWM, approximately square elimination video signal components R gamma function applied to the input of necessary, G, B.

输入视频数据上的这个消除灰度系数函数的效果表示在下表中,这里,应用平方的消除灰度系数函数(以16位分辨率进行计算)。 The elimination of the effect of gamma function on the input video data shown in the following table, where application of the square cancellation function gamma (calculated with 16-bit resolution). 在将平方的消除灰度系数函数加到输入视频数据之后,在下一列中,描述这个消除灰度系数函数的效果。 After elimination of the square gamma function to the input video data, in the next column, we describe the effect of eliminating the gamma function. 这一列的数是前一列数的平方除以255并舍去尾数后所得结果。 This column is the square of the number of the previous column 255 and the resulting number divided by the result of rounding the mantissa. 这样做,确保输出视频范围和输入视频范围是相同的。 In doing so, ensure that the input and output video scope video scope is the same.

如开头的8位输出视频数据列中的数值所看到的,对比较小的输入值来说,许多输入电平被映像为相同的电平。 The value of 8-bit output video data in the beginning of the column as seen, contrast smaller input values, many input levels are mapped to the same level. 这是因为除以255,并且舍去尾数。 This is because divided by 255 and rounding the mantissa. 换句话说,对于较暗的区域,量化级高于与非线性量化相应的较主同区域。 In other words, for darker areas, the quantization level is higher than the corresponding non-linear quantizing compared with the main region. 具体地说,小于16的数值全部被映象为0(这相应于视频信号处理中不可接受的4位视频数据分辨率)。 Specifically, the value is smaller than 16 are all mapped to 0 (this corresponds to the video signal processing unacceptable four video resolution data).

高频抖动是为了避免由于截尾而松动幅度分辨率位的已知技术。 The dither is to avoid the known art due to the truncation loose amplitude resolution bits. 这种技术只是在截断步骤之前如果可获得所需的分辨率时才起作用。 This technique only works if available when required resolution before the truncation step. 然而,这是本申请的情况,因为在消除灰度系数操作之后的视频数据具有16位的分辨率,并且在相应的列中,没有两个相同的数值。 However, this is the case of the present application, because the video data after a gamma operation of elimination with 16 bits of resolution, and in the appropriate columns, no two identical values. 高频抖动在原理上能够恢复由截尾所损失的那么多的位。 Dither can in principle be restored so many bits lost by the truncation. 但是,高频抖动噪声频率降低,因此,随着高频抖动位数而变得更加显著。 However, dither noise frequency decreases, and therefore, the number of bits with dither becomes more significant.

1位高频抖动相当于将有效输出电平数乘以2,2位高频抖动相当于将有效输出电平数乘以4,3位高频抖动相当于将有效输出电平数乘以8。 A dithering corresponds to multiply the number of levels the output valid bit dithering 2,2 valid output equivalent to multiplying the number of levels corresponding to 4,3-bit dithering effective output level number is multiplied by 8 .

考察上面的表,特别是输入值小于16的,揭示出至少要求3位高频抖动,以重现更正确地反映'CRT'显示装置所要求的灰度级描绘的256个视频电平。 Examine the table above, in particular the input values ​​less than 16 reveals that at least the dither claim 3, to reflect more accurately reproduce the 'CRT' display 256 level gray scale video apparatus depicted required.

在上面的表中,以11位消除灰度系数数据开头的列包含从消除灰度系数单元的输出数据。 In the above table, 11 to eliminate the gray scale at the beginning of the coefficient data from the output data of the column contains gamma eliminating unit. 这些数值是以16位消除灰度系数数据开头的列中的数值除以32或者更合适地说截去5位而获得的。 These values ​​are 16-bit values ​​beginning gamma data elimination is divided by the column 32 or, more suitably 5 truncating said obtained. 后面将解释这些数值在高频抖动处理中如何应用。 These values ​​will be explained later how to apply the dither processing.

下面,将详细解释基于单元的高频抖动。 Hereinafter, the dithering will be explained in detail based on high-frequency unit.

基于单元的高频抖动,是将高频抖动数加至每一显示板单元,而不是通常做的那样加至每一显示板象素。 Based on the dither means, the number of high-frequency jitter is added to each of the display panel unit, rather than normally would add to each of the pixels of the display panel. 显示板象素由三个单元组成:红、绿和蓝色单元。 The display panel pixel is composed of three elements: red, green and blue unit. 基于单元的高频抖动的优点是使高频抖动噪声精细,因而使它对观看者来说不那么显眼。 Based on the advantage of the dither cell is to dither fine, thus making the viewer is not so conspicuous.

因为高频抖动图形以单元方式定义,所以不可能使用误差扩散这样的技术,以避免一个单元扩散至不同色的邻近单元,而使图像染色。 Because the dither pattern is defined in a unit, it is not possible to use such error diffusion technique, to avoid a unit cell adjacent to the diffusion of different colors, the image dye. 这不是一个大的缺点,因为已观察到,有时在截断误差和属于视频信号的移动图形之间有不希望的低频移动干扰。 This is not a big disadvantage, because it has been observed sometimes an undesirable low frequency moving interference between the truncation error and a moving pattern belonging to the video signal. 误差扩散在静止图像的情况下最起作用。 In the case of error diffusion works best still image.

根据本发明,建议使用静态三维高频抖动图形,而不使用误差扩散。 According to the present invention, it is recommended to use a three-dimensional static dither pattern, without using error diffusion.

图3示出这种图形的一个例子。 Figure 3 shows an example of such a pattern. 在这个例子中使用3位高频抖动。 3-bit dither in this example. 这表示高频抖动数值为0至7。 This indicates that the dither value of 0-7. 静态3维高频抖动图形由4*4*4单元(4行,每行4单元,重复取自4帧)立方体确定。 Static 3-dimensional dither pattern of 4 * 4 * 4 cells (4 rows of 4 units, from four repeat) cube is determined. 要注意,这个实施例只是一个范例,在本发明的其他实施例中,高频抖动的位数以及高频抖动图形的大小和类型都是能改变的。 It is noted that this embodiment is only one exemplary embodiment, in other embodiments of the present invention, the dither pattern of the dither bits as well as the size and type of change are.

使用3位高频抖动要求消除灰度系数操作用超过最后分辨率的3位进行。 3-bit dither coefficient operation requires the elimination of the gradation with the final resolution of more than three. 最后的分辨率被给定为8位分辨率。 The final resolution is given as 8-bit resolution. 所以子域编码范围是从0至255。 So sub-field coding range is from 0 to 255. 消除灰度系数操作的输出范围也就应该是从0至2040。 Elimination gamma operating output range will be from 0 to 2,040. 要注意,3位高频抖动的最大高频抖动数是7。 Note that three maximum number of high-frequency jitter high frequency jitter is 7. 如果这个数被加到2040,结果是2047,这是最高可能的11位二进制数%11111111111。 If this number is added to 2040, the result is 2047, which is the highest possible 11% binary number 11111111111. 比2040稍低一些的值,例如2032也能使用。 A value slightly lower than 2040, such as 2032 can be used. 这有优点,即相应的值能简单地由16位消除灰度系数数据截去5个最低有效位而得。 This has the advantage that the corresponding values ​​can simply eliminate data truncated gamma 5 obtained by the least significant bits of 16-bit.

某些其他例子:如果子域编码范围是从0至175,消除灰度系数操作的输出范围应该是从0至1400;最后,如果编码范围是从0至127,输出范围应该是从0至1016。 Some other examples: if sub-field coding range is from 0 to 175, gamma cancellation output operation range should be from 0 to 1400; Finally, if coding range is from 0 to 127, output range should be from 0 to 1016 . 对于每一显示板单元和每一帧,相应的高频抖动图形数值加至消除灰度系数函数的输出,从而截断至最终的位数。 And each display panel unit for each frame, the corresponding dither pattern value is added to the cancellation output gamma function, thus cutting to the final digits.

表示在图3中的3位高频抖动图形是静态的。 3 represents the dither pattern in Figure 3 is static. 这意味着它被重复地用于整个显示板。 This means that it is repeatedly used for the entire panel. 从图3可看出,高频抖动图形在显示板的水平方向上重复。 As can be seen from Figure 3, the dither pattern is repeated in the horizontal direction of the display panel. 但是,它也相应地在垂直方向和时间方向上重复。 However, it is correspondingly repeated in the vertical direction and the time direction.

要注意,所建议的图形,当随时间被积分时,对于整个显示板的单元总是给出相同的数值。 It is noted that the proposed pattern, when integrated over time, is, for the entire display panel unit always give the same value. 如果不是这种情况,在某些环境下,一些单元可能采集到与其他单元相比的幅度偏差,这就相当于一个不希望的固定的虚假静态图形。 If this is not the case, under certain circumstances, some cells may be collected by the magnitude of the deviation compared with other units, which is equivalent to an undesirable fixed spurious static graphics.

下面,比较详细地说明本发明基于对象的高频抖动原理。 Next, the object-based dithering principles of the present invention will be described in more detail. 基于对象的高频抖动,对应于修改高频抖动的位数而作为显示的对象的函数。 Based dither object, modify the number of bits corresponding to the dither as a function of the object displayed. 为了这个目的,规定不同的掩码位图形作为高频抖动位分辨率的选择器。 For this purpose, a predetermined bit pattern as a mask different dither bit resolution selector. 例如,如果基于对象的高频抖动与基于单元高频抖动相组合,不同高频抖动位分辨率的实现能够完成如下。 For example, if the object-based dithering and cell based dithering in combination, to achieve different dithering bit resolution can be accomplished as follows.

由图3所示的高频抖动图形保持原样不变。 The dither pattern shown in FIG. 3 remains intact. 也就是说,如同在高频抖动处理开始之前,高频抖动数具有3位分辨率。 That is, as before the dither processing is started, the number of high-frequency dither having three resolution. 这是本实施例中最高可能的位分辨率。 This embodiment is the highest possible bit resolution in this embodiment. 为了实现3位、2位、1位和0位的4种不同的位分辨率,确定4种不同的掩码数值。 In order to achieve 3, 2, 1 and 0 of the 4 different bit resolution, four different masks determined values. 它们是:3位高频抖动→masko=%111=7H2位高频抖动→masko=%110=6H1位高频抖动→masko=%100=4H0位高频抖动→masko=%000=0H这些掩码位图形通过布尔运算被加至高分辨率高频抖动数上。 They are: 3 dither → masko =% 111 = 7H2 bit dither → masko =% 110 = 6H1 bit dither → masko =% 100 = 4H0 bit dither → masko =% 000 = 0H-masking by Boolean operation code bit pattern is added to the number of high-resolution high-frequency jitter. 这能以一些例子作最好的解释。 Some examples of this can to make the best explanation. 在下列示例中,布尔运算是逻辑“与”操作。 In the following example, the Boolean operation is the logical "and" operation.

3位高频抖动 3 dither

2位高频抖动 2 dither

1位高频抖动 A dither

0位高频抖动 0 dither

从3位高频抖动表清楚地看出,加上掩码位图形不影响高频抖动的数值。 As is apparent from the dither table 3, together with the mask bit pattern does not affect the value of the dither. 它们保持不变,因此,3位高频抖动如所希望的被保留。 They remain unchanged and therefore, 3 dither is retained as desired.

从2位高频抖动清楚地看出,加上掩码位图形后,将3位高频抖动数值转换为2位高频抖动数值。 From two dither clearly seen and, with the mask bit pattern, the dither value of 3 is converted to two dither values. 结果形成只有4种不同的输出值对应所要的2位高频抖动。 The result is only four two different dither values ​​corresponding to the desired output.

从1位高频抖动清楚地看出,加上掩码位图形后,将3位高频抖动数值转换为1位高频抖动数值。 From a dither clearly seen and, with the mask bit pattern, the dither value of 3 is converted to a dither value. 结果形成只有2种不同的输出值对应所要的1位高频抖动。 The result is only two kinds of a different dither value corresponding to the desired output.

从0位高频抖动清楚地看出,加上掩码位图形后,将3位高频抖动数值转换为0位高频抖动数值。 As is apparent from the dither bit 0, with the masking bit pattern converts three dither value of 0 dither value. 每位输入高频抖动数值被转换成0对应所要的0位高频抖动。 Each input is converted into a dither value corresponding to the desired 0 0 dither.

具有掩码位图形的高频抖动的位分辨率选择具有这样的优点,即对于高频抖动图形和不同的算法不必用不同的表格。 Having a high frequency dither mask bit pattern selected bit resolution has the advantage that, for the dither pattern and no need to use different algorithms of different forms. 因而,所提出的解决办法是很有效率的。 Thus, the proposed solution is very efficient.

在实际应用中,OSD插入用0位高频抖动进行编码,而视频图像用3位高频抖动进行编码。 In practice, the OSD insertion encoded using dither 0, and the video image is encoded by three dither. 如果等离子显示板用作计算机的监视器,则窗口边框和图标以及文档可用0位高频抖动显示,而带有运动图像(视频景物)的壁纸和窗口,例如,AVI(视听交互)文件或MPG文件可能有1位、2位或3位高频抖动被启用。 If the plasma display panel used as a computer monitor, the window borders and icons available documents 0 dither display, wallpaper and the window with a moving image (video scenes), e.g., AVI (Audio-Visual Interactive) files or MPG file may have one, two, or three dither is enabled.

如果视频图像已按MPEG-4(活动图像编码专家小组规范)编码,基于对象/区域的高频抖动能从这种编码中得到好处。 If the video image is by MPEG-4 (moving picture coding expert group specification) coding, this coding obtained from jitter benefit based on high frequency object / area. MPEG-4为视频对象编码提供工具。 MPEG-4 provides tools for video object coding. 这意味着视频景物中的不同对象独立编码。 This means that independent coding different objects in the video scene. 在本发明的另一实施例中,图像中的对象的高频抖动位数适用属于MPEG-4序列的对象的类型和位分辨率。 Embodiment, the dither bits applicable object in the image type and the resolution of the object belonging to the MPEG-4 sequence In another embodiment of the present invention. 例如常常是背景比图像的其余部分暗,并且对比度低。 For example, it is often darker than the rest of the background image, and low contrast. 所以在这个区域应用3位高频抖动。 Therefore, three dither application in this area. 前景常常比较亮,并且对比度更是比较强。 Prospects often brighter and stronger contrast Gengshi Bi. 所以在这个区域使用1位高频抖动更为适当。 Therefore, using a dither more appropriate in this area.

当然,基于对象的高频抖动需要某种来自与视频对象有关的视频源的信息。 Of course, the object-based dithering requires some high-frequency information from the video source associated with the video object. 这要求图像内容分析,而实现起来可能是很复杂的。 This requires that the image content analysis, and implement it may be very complex. 如果在低费用的应用中,觉得这种图像内容分析的实现过于昂贵,那么,基于对象的高频抖动的低费用实现可被限制于:在屏幕显示插入的情况下关断高频抖动,而在图像的其余部分打开高频抖动。 If the application of low cost, to realize that such an image content analysis too expensive, then the object-based dithering can be implemented in low cost limited to: In the case where the screen is inserted into the dither is turned off, and open the rest of the dither image.

下面,更详细地解释本发明的基于幅度的高频抖动原理。 Hereinafter, the present invention is explained in more detail dither amplitude based on the principle. 基于幅度的高频抖动对应修改高频抖动位数而作为视频分量信号幅度的函数。 Dither amplitude based on the dither bits corresponding to the modified component video signal as a function of amplitude. 这可以用类似基于对象的高频抖动的方式来完成。 This embodiment may be similar to the dither-based objects to complete. 也可以为不同的幅度范围规定一些掩码位图形,它们在对高频抖动数进行布尔运算时,用来选择相应的高频抖动位分辨率。 It may be a predetermined number of mask bit pattern for the different amplitude ranges which when the number of high-frequency jitter Boolean operation used to select the appropriate dithering bit resolution.

在视频技术中,视频信号分量值的范围通常是从0至255(8位码字)。 In the video art, a video signal component value range is usually from 0 to 255 (8-bit words). 这个范围被划分为例如4个区。 This range is divided into four areas, for example. 范围和被分配的相应掩码位图形表示如下:对于(0≤X<32),maska=%111=7H,对于(32≤X<64),maska=%110=6H,对于(64≤X<128),maska=%100=4H,对于(128≤X≤255),maska=%000=0H,这里,X是输入视频分量R,G,B的幅度。 Range and corresponding mask bit pattern is assigned as follows: for (0≤X <32), maska ​​=% 111 = 7H, for (32≤X <64), maska ​​=% 110 = 6H, for (64≤X <128), maska ​​=% 100 = 4H, for (128≤X≤255), maska ​​=% 000 = 0H, where, X is the input video component R, G, B is the amplitude.

根据本发明的这个实施例,在高频抖动电路部分,输入视频信号分量将根据幅度范围分类,高频抖动数以3位分辨率从高频抖动图形中取出,用对应的掩码位图形进行逻辑“与”操作。 According to this embodiment of the present invention, the dither circuit section, the input video signal components will be classified according to the magnitude of the range, the number of high-frequency jitter is removed from the dither pattern resolution to 3, carried out with the corresponding mask bit pattern logical "and" operation. 其结果值再与视频信号分量相加。 And then the resultant value is added to the video signal components. 这种处理在每个单元中分别完成。 This process is completed in each cell separately. 相同的原理用于基于对象的高频抖动。 Based on the same principle as the dither object.

下面,将进一步详细解释三种不同的高频抖动技术,基于单元、基于幅度和基于对象的高频抖动是如何结合起来达到优化目的。 Hereinafter, we explained in further detail in three different dithering techniques, cell-based, object-based and based on the amplitude of the dither is how to optimize the combination of object.

考虑以上3位高频抖动数的例子,一个综合的解决方案可以用以下的这些公式来描述:Rout=trunc[degamma[Rin]+(rdither[x,y,z]AND maska[Rin,x,y,z]AND masko[x,y,z])]Gout=trunc[degamma[Gin]+(gdither[x,y,z]AND maska[Gin,x,y,z]AND masko[x,y,z])]Bout=trunc[degamma[Bin]+(bdither[x,y,z]AND maska[Bin,x,y,z]AND masko[x,y,z])]这里:Rin表示红色输入视频信号分量R的视频电平,Gin表示绿色输入视频信号分量G的视频电平,Bin表示蓝色输入视频信号分量B的视频电平,degamma[]表示11位分辨率的消除灰度系数函数。 Examples of the above considerations the number of three high-frequency jitter, a comprehensive solution can be described by the following formulas: Rout = trunc [degamma [Rin] + (rdither [x, y, z] AND maska ​​[Rin, x, y, z] AND masko [x, y, z])] Gout = trunc [degamma [Gin] + (gdither [x, y, z] AND maska ​​[Gin, x, y, z] AND masko [x, y , z])] Bout = trunc [degamma [Bin] + (bdither [x, y, z] AND maska ​​[Bin, x, y, z] AND masko [x, y, z])] where: Rin represents red input video levels of a video signal component R, Gin denotes the video level of the green input video signal component G is, Bin denotes the blue input video signal component B video levels, degamma [] represents 11-bit resolution to eliminate gamma function.

maska[]表示基于幅度的掩码值,masko[]表示基于对象的掩码值,rdither[]表示所使用高频抖动图形用于红色单元的,基于单元的高频抖动数,gdither[]表示所使用高频抖动图形用于绿色单元的,基于单元的高频抖动数,bdither[]表示所使用高频抖动图形用于蓝色单元的,基于单元的高频抖动数,x表示显示板上的象素数,y表示显示板上的行数,z表示帧数,trunc[]表示截取至8位分辨率,也就是说截下3位最低有效位。 Maska [] denotes the amplitude-based masking value, MASKO [] represents the value of the object based on the mask, rdither [] represents the dither pattern used for red cells, based on the number of the dither cell, gdither [] represents the dither pattern is used for green cells, using the dither pattern based on the number of the dither cell, bdither [] represents a blue cell, based on the number of the dither cell, x denotes a display panel pixel number, y represents the number of rows in the display panel, z represents a number of frames, the trunc [] taken to represent 8-bit resolution, i.e. truncated at 3 least significant bit.

因此,表达式:(rdither[x,y,z]AND maska[Rin,x,y,z]AND masko[x,y,z])],(gdither[x,y,z]AND maska[Gin,x,y,z]AND masko[x,y,z])],(bdither[x,y,z]AND maska[Bin,x,y,z]AND masko[x,y,z])]表示了将基于对象和幅度的高频抖动的掩码位图形结合之后而产生的高频抖动数。 Thus, the expression: (rdither [x, y, z] AND maska ​​[Rin, x, y, z] AND masko [x, y, z])], (gdither [x, y, z] AND maska ​​[Gin , x, y, z] AND masko [x, y, z])], (bdither [x, y, z] AND maska ​​[Bin, x, y, z] AND masko [x, y, z])] It represents the number of the dither amplitude and the objects after the high-frequency dither mask bit pattern generated based on binding.

下面的表中给出了这种计算的结果。 The table below gives the results of this calculation. 表中只例举了三种输入值8、21、118的结果。 The results are exemplified in Table only three input values ​​of 8,21,118. 这是因为将所有的结果列在纸上,不是件容易的事。 This is because all of the results are presented in the paper is not an easy task. 然而高频抖动的效果已经很明显地表示在下面的表中。 However, the dither effect has been clearly shown in Table below. 第一个表是关于3位高频抖动的例子。 The first table is an example of the dither of about 3. 它表明,与没有高频抖动的实施例相比,由于有了高频抖动,在输入值为8时,其对应的输出值在两种情况下由0变成了1。 It shows that, compared to the embodiment without dithering, thanks dither when the input value is 8, its corresponding output value in both cases from 0 becomes 1. 当输入值为21时,与没有高频抖动的实施例相比,其对应的输出值在五种情况下由1变成了2。 When the input value is 21, compared to the no dither embodiment, the output value corresponding to the five situations into a 2 1. 当输入值为118时,其对应的输出值在三种情况下由54变成了55。 When the input value is 118, which corresponds to an output value in the three cases 54 becomes 55. 当然,随着输入值的增加,高频抖动的效果将逐渐减小,这是因为高频抖动值与输入值的比例减小了。 Of course, as the input value, the dither effect will gradually decrease, because the ratio of the dither value to the input value is decreased.

Maska=masko=%111=3位高频抖动 Maska = masko =% 111 = 3 high - frequency dithering

下面的表列出了2位高频抖动的计算结果。 The following table lists the results of the two dither. 这里,由于所加的高频抖动数小了,所以,高频抖动的效果也变小了。 Here, since the number of the dither added small, therefore, the dither effect is smaller. 然而,其区别仅仅在于,当输入值为18时,输出值只在四种情况下变化,输入值为118时,输出值只在两种情况下由54变成了55。 However, the only difference is that, when the input value of 18, the output value changes only in four cases, the input value is 118, the output value in both cases only the 54 became 55.

Maska=masko=%110=2位高频抖动 Maska = masko =% 110 = 2 high - frequency dithering

下面的表列出了1位高频抖动的计算结果。 The following table lists the results of a dither. 这里,当输入值为8和118时,高频抖动的效果已消失,但当输入值为21时,高频抖动效果依然存在,其对应的输出值在四种情况下从1变成了2。 Here, when the input values ​​are 118 and 8, the effect of dithering has disappeared, but the input value is 21, the dither effect is still present, the corresponding output values ​​in four cases from a 1 to a 2 . 当然,对于其它一些输入值,比如说12,高频抖动效果仍然保持。 Of course, for some other input values, like 12, the dither effect is still maintained.

Maska=masko=%100=1位高频抖动 Maska = masko =% 100 = 1 high - frequency jitter

图4给出了本发明的一个电路实现。 Figure 4 shows a circuit implementation of the invention. R、G、B输入视频数据送到degam消除灰度系数单元10和高频抖动估算单元12。 R, G, B input video data to eliminate degam gamma dithering unit 10 and the estimation unit 12. 消除灰度系数单元10执行11位消除灰度系数函数运算,并将11位视频数据R、G、B送到输出端。 Gamma elimination unit 10 performs the output terminal 11 to eliminate gamma function calculation, and 11 video data R, G, B supplied. 高频抖动估算单元12计算出高频抖动数:DR用于红色,DG用于绿色,DB用于蓝色。 The dither evaluation unit 12 calculates the number of the dither: DR for red, DG for green, DB for blue. 为做到这一点,需要同步信号H和V来决定当前处理的是哪个象素,和哪一行、哪一帧是有效的。 To do this, it is necessary sync signals H and V to determine which pixel is currently processed and which line, which frame is effective. 这些信息被用来寻址一个查询表,该表中存放着高频抖动图形。 This information is used to address a lookup table, which table stores the dither pattern. 在这个单元中,R、G、B分量被用来估算出幅度掩码值maska。 In this unit, R, G, B component is used to estimate the amplitude mask values ​​maska. 用于当前象素的基于对象的掩码值MO由视频源中的一个单元传送,例如MPEG4解码器。 For the current pixel based on the object by the mask value MO unit transmits a video source, such as MPEG4 decoder. 图中没有把这个单元表示出来。 FIG this unit is not shown. 在这个单元不存在的情况下,可以用来自外部的OSD(光扫描装置)嵌入电路的快速空白信号来代替信号MO。 In the case of this unit does not exist, the fast blank signal may be embedded with the OSD circuit (optical scanning device) from an external signal instead of MO. 根据上面讨论的公式,单元12还执行布尔运算。 According to the formula discussed above, the unit 12 also performs a Boolean operation. 在计算单元11中,高频抖动数和消除灰度系数输出值被加在一起,截去其结果中的最低有效的3位,得出最终的输出值Rout、Gout和Bout。 In the calculation unit, the number of the dither and an output value of 11 to eliminate gamma is added together, truncating the least significant three bits of the result, get the final output values ​​Rout, Gout and Bout. 这些值被送到一个子域编码单元13,这个单元在控制单元16的控制下,进行子域编码。 These values ​​are sent to a sub-field coding unit 13, this unit under the control of the control unit 16 performs sub-field coding. 子域编码字被保存在存储器单元14中。 Sub-field code word is stored in the memory unit 14. 对这个存储器单元的读写,也是由外部控制单元16来控制的。 The reading and writing of memory cells, the external control unit 16 is controlled. 为了等离子显示板寻址,子域编码字被从存储器装置中读出,一行的所有编码字被集中起来,形成一个单一的、很长的编码,用来做行式PDP寻址。 For plasma display panel addressing, the sub-field code word is read out from the memory device, the word line are all coded together to form a single, very long code, the line used for PDP addressing. 这在串行一并行转换单元15中进行。 This is done in a serial parallel conversion unit 15. 控制单元16产生PDP控制用的全部扫描和维持脉冲。 PDP control unit 16 generates control all scan and sustain pulses. 它接收水平和垂直同步信号作为时间基准。 It receives horizontal and vertical synchronizing signal as a time reference. 等离子显示板17用于显示处理的视频图像。 The plasma display panel 17 for displaying a video image processing.

本发明尤其用在PDP中。 In particular, the present invention is used in the PDP. 等离子显示器普遍使用在消费电子产品中,例如电视机,也用作计算机的监视器。 A plasma display commonly used in consumer electronic products such as televisions, but also as a computer monitor. 然而本发明的使用对于矩阵显示器也是合适的,其中,光发射也使用子域中的小脉冲控制,即用PWM原理控制光发射。 However, the use of the present invention are also suitable for the matrix display, wherein the light emission is also used in the subdomain small pulse control, i.e., the PWM control light emission principle.

Claims (10)

1.一种处理在显示器上显示的RGB视频图像数据的方法,所述显示器具有多个与视频图像象素的彩色分量相应的发光元件,其中,高频抖动方法被应用于视频数据,以细化视频图像中的灰度级描绘,其特征在于:在高频抖动方法中,输入视频数据被转换为消除灰度系数校正补偿的较高位分辨率,并且高频抖动数被加到较高位分辨率的输入视频数据上,在输入视频数据被转换为最后的位分辨率的截断步骤之后,高频抖动方法包括下列单独或组合使用的一个或多个特征:被加至视频帧的给定象素的彩色分量R、G、B的视频数据上的高频抖动数是彼此区别和不同的;根据视频图像中的区域/对象,形成可任意使用的高频抖动数组;根据视频信号电平,形成可任意使用的高频抖动数组。 RGB image data 1. A method of processing a video displayed on a display, said display having a plurality of pixels of the color components of the video image corresponding to the light emitting element, wherein the dither method is applied to video data, a fine video image gradation drawing, wherein: in the dither method, the input video data is converted into gamma-correction to eliminate a higher bit resolution, and the high frequency jitter is added to the number of higher bit resolution on the input video data rate, after the input video data is converted to final bit resolution truncation step, the dither method comprising one or more features alone or in combination: the video frame is added to a given image prime color components R, G, and high frequency jitter on the number of video data B is different and distinguishable from each other; the video image areas / objects, the dither array is formed may optionally be used; in accordance with the video signal level, dither array is formed may optionally be used.
2.根据权利要求1所述的方法,其特征在于:对于基于单元的高频抖动,视频图像被划分为若干段,并确定静态三维高频抖动图形,该图形在视频序列中重复使用,其中,第一维对应于视频行数,第二维对应于一个视频行段内的象素数,第三维对应于视频帧数。 2. The method according to claim 1, wherein: based on the dither cell to the video image is divided into several segments, and determining the three-dimensional static dither pattern that is repeated in a video sequence, wherein the first dimension corresponds to a video line number, a second dimension corresponding to the number of pixels in a video line segment, the third dimension corresponding to the number of video frames.
3.根据权利要求2所述的方法,其特征在于:以三位高频抖动数的位分辨率,以一段4行,每行4个象素,连续4帧的每一帧,确定静态三维高频抖动图形。 3. The method according to claim 2, wherein: the three-bit resolution dithering number for a period of 4 rows of 4 pixels, each frame of four consecutive frames, to determine the three-dimensional static dither graphics.
4.根据权利要求1-3之一所述的方法,其特征在于:对于基于区域/对象的高频抖动,有关不同的视频对象/区域的信息从MPEG4数据流中取得。 4. The method according to any one of claims 1-3, characterized in that: based on the area for the dither / object, information about different video objects / region is acquired from the MPEG4 data stream.
5.根据权利要求1-3之一所述的方法,其特征在于:对于高频抖动处理中可任意使用的高频抖动数的每一特征组,相应的掩码位图形被赋值,它通过布尔运算确定高分辨率高频抖动数的哪些位被取作最后的高频抖动数。 5. The method according to one of claims 1-3, characterized in that: the number of groups for each feature of the dither processing using the dither optionally, the corresponding mask bit pattern is assigned it by Boolean operations to determine which bits of high resolution dithering number is taken as the final number of high frequency jitter.
6.根据权利要求1-3之一所述的方法,其特征在于:对于基于视频电平的高频抖动,视频电平的全范围被划分为若干段,对每一段,相应的掩码位图形被赋值,它通过布尔运算确定高分辨率高频抖动数的哪些位被取作最后的高频抖动数。 The method according to any one of claims 1-3, characterized in that: for dither-based video levels, the full video level range is divided into several segments, each segment of the corresponding mask bit pattern is assigned which determines which bits of the high resolution dithering number is taken as the final number of high-frequency jitter by Boolean operation.
7.根据权利要求6所述的方法,其特征在于:整个视频电平范围从0至255被划分为4段,每段为0至31,32至63,64至127,和128至255,并相应地在各段范围使用下列位分辨率,即3位,2位,1位,0位,其中,位分辨率随着视频电平范围的增加而减小。 7. The method according to claim 6, characterized in that: the entire video level range from 0 to 255 is divided into four segments, each segment is 0 to 31, 32 to 63, 64 to 127, and 128 to 255, and accordingly used in the scope of the following paragraphs bit resolution, i.e. 3, 2, 1, 0, wherein, with increasing bit resolution video level range increases.
8.根据权利要求1-3之一所述的方法,其特征在于:下列公式应用于组合使用所有高频抖动特征:Rout=trunc[degamma[Rin]+(rdither[x,y,z]AND maska[Rin,x,y,z]AND masko[x,y,z])]Gout=trunc[degamma[Gin]+(gdither[x,y,z]AND maska[Gin,x,y,z]AND masko[x,y,z])]Bout=trunc[degamma[Bin]+(bdither[x,y,z]AND maska[Bin,x,y,z]AND masko[x,y,z])]这里:Rin表示红色输入视频信号分量R的视频电平,Gin表示绿色输入视频信号分量G的视频电平,Bin表示蓝色输入视频信号分量B的视频电平,degamma[]表示11位分辨率的DEGAMMA函数。 8. The method according to one of claims 1 to 3, characterized in that: the following formula is applied to all compositions wherein the dither: Rout = trunc [degamma [Rin] + (rdither [x, y, z] AND maska ​​[Rin, x, y, z] AND masko [x, y, z])] Gout = trunc [degamma [Gin] + (gdither [x, y, z] AND maska ​​[Gin, x, y, z] AND masko [x, y, z])] Bout = trunc [degamma [Bin] + (bdither [x, y, z] AND maska ​​[Bin, x, y, z] AND masko [x, y, z]) ] where: Rin denotes the video level of the red input video signal component R in, Gin denotes the video level of the green input video signal component G is, Bin denotes the blue input video signal component B video levels, degamma [] represents 11-resolved DEGAMMA function rates. maska[]表示基于幅度的掩码值,masko[]表示基于对象的掩码值,rdither[]表示所使用高频抖动图形用于红色单元的,基于单元的高频抖动数,gdither[]表示所使用高频抖动图形用于绿色单元的,基于单元的高频抖动数,bdither[]表示所使用高频抖动图形用于蓝色单元的,基于单元的高频抖动数,x表示显示板上的象素数,y表示显示板上的行数,z表示帧数,和trunc[]表示截取至特定的位分辨率,尤其是8位分辨率。 Maska [] denotes the amplitude-based masking value, MASKO [] represents the value of the object based on the mask, rdither [] represents the dither pattern used for red cells, based on the number of the dither cell, gdither [] represents the dither pattern is used for green cells, using the dither pattern based on the number of the dither cell, bdither [] represents a blue cell, based on the number of the dither cell, x denotes a display panel pixel number, y represents the number of rows in the display panel, z represents the number of frames, and the trunc [] denotes taken to a specific bit resolution, in particular 8-bit resolution.
9.根据权利要求1-3之一所述的方法,其特征在于所述方法应用于等离子显示中的视频信号处理。 9. The method according to any one of claims 1-3, wherein said video signal processing method used in plasma display.
10.一种用于处理在显示器上显示的视频图像的装置,所述显示器具有多个与视频图像象素的RGB彩色分量相应的发光元件,所述装置包括计算高频抖动数的高频抖动单元,所述高频抖动数被加至视频图像数据,以细化视频图像中的灰度级描绘,其特征在于:在高频抖动单元内,包含将输入视频数据转换为较高位分辨率的转换装置,和将高频抖动数加至较高位分辨率的输入视频数据的加法装置,以及进行截断步骤的截断装置,在截断步骤中输入的视频数据被转换为最后的位分辨率,高频抖动单元根据下列单独或组合使用的一个或多个特征计算高频抖动数:高频抖动单元对RGB彩色分量使用不同的高频抖动数图形,以便将彼此区别和不同的高频抖动数加到给定象素的RGB分量;装置,根据视频图像中的区域/对象,选择不同的可任意使用的高频抖动数组;装置 10. An apparatus for video image display processing on a display, said display having a plurality of video images of the RGB color components of pixels corresponding to the light emitting element, said calculating means comprises a number of high-frequency jitter dither means a dither number is added to the video image data to refine the gray scale video image drawing, wherein: in the dither cell, comprising converting the input video data in higher bit resolution conversion means, and a high-frequency jitter is added to the number of higher bit resolution of input video data addition means and the truncation means for truncating step, the input video data in a cutoff step is converted into the final bit resolution, high-frequency jitter frequency unit number calculated according to the one or more features alone or in combination: the use of different dither unit number of the dither pattern of RGB color components in order to distinguish from one another and different from the number of high-frequency jitter is added to RGB components of the given pixel; means according to the area of ​​the video image / object, select different dither array may optionally be used; means ,根据视频信号电平,选择不同的可任意使用的高频抖动数组。 The video signal levels, select a different dither array may optionally be used.
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